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IB/mthca: Check that SRQ WQE size does not exceed device's max value

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Guarantee the calculated work queue entry size does not exceed the max
allowable WQE size when creating an SRQ.  This is a problem with Arbel
in Tavor-compatibility mode because the current WQE size computation
method rounds up to next power of 2.

Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Jack Morgenstein 2006-03-20 12:35:34 +02:00 committed by Roland Dreier
parent 0ef61db837
commit ded9ad721d
1 changed files with 4 additions and 0 deletions
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4
drivers/infiniband/hw/mthca/mthca_srq.c
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@ -205,6 +205,10 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
ds = max(64UL,
roundup_pow_of_two(sizeof (struct mthca_next_seg) +
srq->max_gs * sizeof (struct mthca_data_seg)));
if (ds > dev->limits.max_desc_sz)
return -EINVAL;
srq->wqe_shift = long_log2(ds);
srq->srqn = mthca_alloc(&dev->srq_table.alloc);